<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        //对象的合并
        const a = {
            'a':'aa'
        }
        const b = {
            'b':'bb'
        }
        const c = {
            'c':'cc'
        }
        const d = {
            'd':'dd'
        }
        const merge = {...a,...b,...c,...d}
        console.log(merge)
    </script>
</body>
</html>